Clarion DPX2250 ユーザーズマニュアル
APX/DPX Amplifiers
21
English
4. Increase the volume and verify that the amplifier reproduces the audio at full
frequencies without distortion.
If you hear distortion check the connections and verify that the gain control is set
correctly. Another cause of distortion could be underpowered or damaged speak-
ers. Refer to Troubleshooting.
correctly. Another cause of distortion could be underpowered or damaged speak-
ers. Refer to Troubleshooting.
6. Troubleshooting
Indicator lights
The APX2180, APX4360, DPX1800 and DPX11500 have lights that indicate amplifier
status.
status.
Blue top
Red end-
Blue end-
LED
panel light
panel light
Meaning
on
off
off
Amplifier running normally
on
alternating between red and blue In thermal protection mode
slow blink
slow out-of-sync
off
Over voltage;
blink
reduce the input voltage
quick blink
quick in-sync
off
Short circuit protection
blink
3 blinks, then pause
3 blinks, then pause
off
Repeated shorts detected;
remove the short circuit, wait
5 minutes for error condition
to clear; or clear condition by
removing the main power, for
example, by pulling the fuse.
remove the short circuit, wait
5 minutes for error condition
to clear; or clear condition by
removing the main power, for
example, by pulling the fuse.
No Audio
• Low or no remote turn-on voltage: check remote connections at the amplifier and
source unit.
• Blown amplifier fuse: replace with a new fast-blow fuse (same rating).
• Power wires not connected: check battery and ground wiring at the amplifier and
• Power wires not connected: check battery and ground wiring at the amplifier and
check the battery connections.
• Speaker leads shorted: check speaker continuity to ground; it should not show a
common ground.
• Speakers not connected or are blown: check speaker connections at the ampli-
fier and measure at speakers. Measure coil impedance at amplifier with speaker
wires disconnected.
wires disconnected.
APX-DPXOwnersManual.pmd
2006-03-14, 21:47
21